title: Noninvasive coronary angiography with 64-channel multidetector computed tomography in patients with acute coronary syndrome.
abstract: BACKGROUND
  Advances in computer tomography (CT) imaging technology in recent years have facilitated the possibility of noninvasive coronary angiography.
  
  
  OBJECTIVE
  To compare the diagnostic accuracy of 64-channel multidetector computed tomography (MDCT) with conventional invasive coronary angiography (ICA) for the detection of significant coronary stenosis in patients with acute coronary syndrome (ACS).
  
  
  METHODS
  MDCT was performed in 60 patients classified with non-ST-elevation infarction (NSTEMI) or unstable angina and scheduled for ICA within 3 days. The diagnostic accuracy of MDCT was evaluated using quantitative coronary angiography (QCA) as the gold standard.
  
  
  RESULTS
  48 out of 60 patients had interpretable scans by both MDCT and ICA. On a segment-based analysis, 488 out of 665 segments with a diameter of > or =1.5 mm, as defined by QCA, were interpretable by MDCT. Sensitivity was 78%, specificity 87%, positive predictive value 47%, and negative predictive value 97% in detecting and excluding significant coronary stenosis, as defined with MDCT. On a per patient-based analysis, sensitivity was 89%, specificity 50%, positive predictive value 84%, and negative predictive value 60%.
  
  
  CONCLUSIONS
  Limited diagnostic accuracy restricts the usefulness of coronary MDCT in patient groups with a high pretest probability of disease, such as in acute coronary syndrome.
authors.affiliation: Department of Radiology, Aker University Hospital, Oslo, Norway. geir.ulimoen@online.no
authors.forename: G R
authors.initials: GR
authors.lastname: Ulimoen
authors.forename: E
authors.initials: E
authors.lastname: Gjønnaess
authors.forename: D
authors.initials: D
authors.lastname: Atar
authors.forename: T
authors.initials: T
authors.lastname: Dahl
authors.forename: E
authors.initials: E
authors.lastname: Stranden
authors.forename: G
authors.initials: G
authors.lastname: Sandbaek
mesh_terms: D054058:Acute Coronary Syndrome / Q000150:complications / Q000175:diagnosis*; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000789:Angina, Unstable / Q000209:etiology; D003287:Contrast Media; D017023:Coronary Angiography / Q000379:methods*; D023921:Coronary Stenosis / Q000150:complications / Q000175:diagnosis; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D011237:Predictive Value of Tests; D011446:Prospective Studies; D011856:Radiographic Image Enhancement / Q000379:methods; D015641:Radiography, Interventional / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014283:Triiodobenzoic Acids
chemical_list: D003287:Contrast Media; D014283:Triiodobenzoic Acids; C044834:iodixanol